Wonkblog (Washington Post) has reported on a Verdant Labs study of the political allegiances of persons in a multitude of professions.
Data like this is part of what determines which political online ads you see and what election mailings jam your recycling. Even the best data still sometimes leads to mistaken targeting. After all, despite the odds, I know a luxury car salesman who is a Democrat.
Follow the link to Verdant if you want to look further at how they break out categories such as academic disciplines. It's fun.
H/t Episcopal Cafe where they took note of the extremely Democratic leanings of Episcopal priests.